A modern website lives and dies on the strength and compactness of its underpinning CSS. If you're still using tables to lay out your pages, it's time you stopped, as they're clunky, outdated and conform poorly to current standards.
Only trouble is, tables are easier to hand code than CSS, as they're just a bunch of repetitive tags. Same goes for fonts, which we can code up using lazy family and size commands with no real thought to such subtleties as line heights. CSS is far more descriptive, allowing you to position frames with pixel-perfect accuracy and supplement font sizes with line height specifications and tailored weights.
By focusing entirely on stylesheet creation, this small but powerful application cuts out several levels of confusion and allows you to create beautiful output by filling in and checking boxes.
Its party trick is the so-called X-Ray mode, which lets you click on areas of an inspiring page - say apple.com - and see how its tags work. So long as you don't use this as a quick route to plagiarism, it's a great learning tool for first-time CSS programmers.